Simplified Bernoulli formula to predict flow limiting stenosis at coronary computed tomography angiography

Publication date: September–October 2018
Source:Clinical Imaging, Volume 51
Author(s): Nobuo Tomizawa, Kodai Yamamoto, Shinichi Inoh, Takeshi Nojo, Sunao Nakamura
ObjectiveTo compare the diagnostic performance of estimated energy loss (EEL) with diameter stenosis (DS) to estimate significant stenosis by fractional flow reserve (FFR).Materials and methodsOne hundred twenty-five patients were included. EEL was calculated using DS, lesion length, minimal lumen area and left ventricular volume. FFR ≤ 0.80 was determined significant.ResultsEEL improved the accuracy from 63% (95% confidence interval (CI): 55–72%) to 83% (95% CI: 75–89%, p < 0.0001). EEL increased the area under the receiver operating characteristics curve from 0.63 to 0.85 (p < 0.0001).ConclusionsEEL improved the diagnostic performance to detect functionally significant stenosis than DS.



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